Clamping-ear for trolley-wires.



G. J. HIXSON.

GLAMPING BAR FOR TROLLEY WIRES.

APPLIOATION FILED AUG. 25, 1911.

Patented Dec. 17, 1912.

Inventor Clinton J. H ixson,

"ran TATE PATENT Futon).

emuron J. rnxson, or sonnnncrnnrwnwstonx, ASSIGNOR TO GENERAL ELECTRIC I oolvrrnug gneonronarion on NEW YORK. j,

onanr ne nan. non TROLLEY-WIRES.

ramm d Dec. 17,1912.

Application filed August 25,1911. Serial a... 646,046.

To all'whom it may concern:

Be it known that I, CLINTON J. HIXSON, a

citizen of the United States, residing. at v Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Clamping-Ears for:

Trolley-Wires, of whie'hj th fouowingjis a pecification. l v I This invention relates to suspension of; electric conductors, and more. espec ally to. mechanlcal clampmg "ears for" trolley wires of electric railways. The object of the 2.5 bolt; Fig. 2 isa transverse section of the parts shownin'Fig. 1 Fig. 3 is a perspec tive view of the same with parts in-section and parts detached; Fig. 4:. is .an underside sectional view of the nut sleeve taken on elevation of the ear with the lock washer shownjn section.

The ear comprises two jaws 1 provided at their lower ends with extended knife edges 2 and at their, upper edges with rectangular bosses 3 having upper surfacest disposed at an angle to the general plane of each ear, so that the upper outer corners are highest? On the inner: surface of each ear' are; twolugs 5 transversely drilled for the re-.

ception of a hinge pin 6,'and above the horizontal plane of the lugs the ears are each provided with a beveled or conical shoulder 7. An expander nut Shaving a peripheral groove 9 near its lower end forming an upwardly tapering or frusto-conical head 10 engages the conical shoulders 7 of the jaws and operates to wedge them apart when drawn upwardly. The expander nut 8 is cylindrical at its body portion and has at its upper end a polygonal flange 11 for engagement with a correspondingly-shaped nut sleeve 12. The nut sleeve 12 has at its upper end an inturned flange l3 and is at 5-5 its lower end peened over or upset, as shown invention isto provider. a mechanical clamping ear; 'wh1ch may .or. in parallelism, and drillin line 1-4 of Fig: .1; and Fig. 5 is an end' at 14, Fig. 4,,so. as to underlie'the flange 11 of the nut and thereby secure the sleeve and nutagalnst disengagement while permitting hmlted movement of the sleeve lengthwise of the nut.'

I Between the nut sleeve 12 and the upper ends-of the jaw bosses 4 is disposed a lock washer '15, which also serves as a housing for-the jaws and consists of a sheet metal punching with its ends 16 bent down at 'rrghtan'gles and provided with circular recesses- 17 to straddle'theends of the jaws and-he: thereby held against rotation. The opposite side' edges of the washer 15 are provided with flattened lips 18 adapted to be bentup against the polygonal sides of the 'nut sleeve 12 after having been-turned home; 4

- By disposing the lugs 5 unsymmetrically,

as shown in Fig. 3, the jaws may be made counterparts, and upon placing two jaws together with their knife edges,in contact the lugs of both aws while so held, and then upon in, serting of the hingepin 6, the edges 2-wil] always move in parallel relation and there'- byinsure a perfect grip throughout their length upon the trolley wire 19, and by making the head 10 of the expander nut 8 sufl'iciently large the jaws cannot become 5 displaced therefrom after the hinge pin 6' has been inserted and headed over.

Tc) apply my ear, the jaws 1 are brought into engagement with the trolley wire 19 and the threaded end of an ordinary insulator bolt 20 introduced. in the expander .nut 8. Then upon rotation of the sleeve 12,

and with it the nut 8, the shoulder'21 of the insulator bolt is brought into engagement with the upper end of'the sleeve 12 9 and the expander nut 8 drawn upwardly through the sleeve 12, while the jaws'l are prevented. from rising by reason of their engagement with the washer 15 which engages thelower end of the sleeve 12. The coni'oal'head 10 of the nut operates on the conical shoulders 7 to force the upper ends of the jaws apart, and this wedging action is assisted by the upper outer edges 4 of the jaws, which engage the washer 15, being spaced from the vertical plane of the hinge 20f the jaws whereby a turning moment is exerted thereon as the jaws are raised by the nut.

I do not desire to restrlct myself to the on their upper inner surfaces, a grooved expander rotatably engaging said shoulders, and a sleeve surrounding'the upper end of said expander and constructed to rotate therewith but 'freeto move longitudinally thereon. 1'

2. In a clamping ear, the combination of two hinged jaws having beveled shoulders on their upper inner surfaces, an expander nut having an upwardly tapered head r0- tatably engaging said shoulders, and a polygonal sleeve surrounding the upper end of said nut and movable longitudinally thereon.

3. In a clamping ear, the combination or two hinged ja-ws having beveled shoulders on their upper innersurfaces, an expander nut having a conical head 'ro-tatably engaging the lower surfaces of said shoulders,

and a polygonal sleeve surrounding the upper end of said nut and movable longitudinally thereon.

4. In a clamping ear, the combination of two hinged jaws, an expander nut rotatably engaging the upper inner surfaces of said jaws and having a polygonal flange at its upper end, and a polygonal sleeve fitting over said flangeand projecting under the lower edge of said ange.

5. In a clamping ear, the combination of two hinged jaws, an expander nut having an upwardly tapering head rotatably engaging the upper inner surfaces of said j aws, a sleeve surrounding the upper end 01": said nut, and a washer interposed between said sleeve and the upper ends of said jaws and provided with side lips and down-turned recessed ends.

In witness whereof, I have hereunto set my hand this 23rd day of August, 1911.

' CLINTON J. HIXSON.

WVitnesses:

BENJAMIN B. HULL, HELEN Onrono.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents Washington, D. 0. 

